Suppose an Experimenter Becomes Proficient with a Technique That Allows

question 6

Multiple Choice

Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If a researcher moves the operator to the far end of the operon, past the transacetylase (lacA) gene, which of the following processes would likely occur when the cell is exposed to lactose?

• A) The inducer will no longer bind to the repressor.
• B) The repressor will no longer bind to the operator.
• C) The operon will never be transcribed.
• D) The genes of the lac operon will be transcribed continuously.

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Definitions:

Response Shaping

A process of shaping behaviour by gradual approximations of what is expected. For example, a child who is intellectual disability and may be unable to get dressed independently can be taught the process gradually by being rewarded for putting on one item at a time until he or she is eventually able to handle the entire task.

Exposure

A therapeutic technique used in behavioral therapy to treat anxiety disorders that involves the exposure to the feared object or context without any danger in order to overcome their anxiety.

Exposure Therapy

Any therapeutic procedure that repeatedly confronts the person with a stimulus that typically elicits an undesirable behaviour or an unwanted emotional response until the behaviour or response no longer occurs.

Systematic Desensitization

A therapeutic technique whereby patients imagine the lowest feared stimuli and combine this image with a relaxation response. Patients gradually work their way up the fear hierarchy so that they can learn to handle increasingly disturbing stimuli.